A bit of one, a bit of the other. The list that gets an absolute majority (whether in the first or second round) gets one quarter of the seats on the regional council as a "base". The remaining three-quarters are distributed proportionally, with a threshold of 5% for getting a seat. So it's proportional with a big advantage to the winning list (intended to produce a clear majority in the council and avoid a "hung" council or constantly shifting coalitions).